Speaking as a high school coach, that is one of the most unprofessional and unethical things I've ever seen from an athletic program. I don't care what he did, he's a teenager and you don't use a media platform to trash the kid and sanctimoniously put yourself as the morally superior institution with him as your tool.
Even if his accused/apparent story is true, the public bashing is absurd from an institution of adults. Maybe try to right his ship, like CJP has done with Banks and Thompson.
Throwing a kid out to the wolves does him no good. Kids like that need mentors, not to be treated like a lost cause. Jmo, not to excuse any such behavior of the above. I am just more about rehabilitation than retribution.